【摘要】 节理裂隙的存在是影响岩体动力学性能的主要原因，以节理岩体中不同倾角和充填介质为研究对象，利用分离式霍普金森压杆(SHPB)完成了7种不同节理倾角、3类不同充填介质的节理试样的冲击试验，研究节理试样的动力特性、能量耗散规律。结果表明：(1)不同充填介质节理试样的应力-应变曲线差异明显，泥沙、石灰节理试样的应力-应变曲线在倾角α≤45°时表现出塑性破坏特征，α>45°时表现为脆性破坏，而石膏节理试样以脆性破坏为主，仅在α=45°时由于应力波传播的影响表现出塑性破坏；(2)同一充填介质节理试样的动态抗压强度随倾角α的增大先减小后增大，当α=45°时处于最小值，同一角度下3类节理试样的动态抗压强度关系为：石膏节理>石灰节理>泥沙节理，与节理充填介质单轴抗压强度的大小关系一致；(3)3组试样的各能量比随倾角α的增大呈现不同趋势，反射能量比随倾角α增大先增大后减小，在α=45°时达到最大值，透射能量比和吸收能量比随节理倾角α增大先减小后增大，在α=45°时达到最小值。更多还原

【Abstract】 The presence of joint fractures significantly influences the dynamic performance of the rock mass.To investigate the effects of joint angles and filling materials on the dynamic response of filling joint samples under impact loading, a series of impact tests were conducted using a split Hopkinson pressure bar(SHPB).Samples with seven different joint angles and three types of filling materials were tested.The relationships between dynamic characteristics, energy dissipation, joint angles, and properties of the filling material were systematically analyzed.The results indicate that:(1) The stress-strain curves of the joint samples of different filling media are significantly different.The stress-strain curves of sediment and lime filling samples show plastic failure characteristics at joint angle α≤45° and brittle failure at joint angle α>45°,while gypsum filled samples primarily display brittle failure, except at joint angle α=45°,where plastic failure occurs due to stress wave propagation effects.(2) The dynamic compressive strength of joint samples with the same filling material initially decreases and then increases with the increasing joint angle α,reaching a minimum value at α=45°.Among the three filling materials, gypsum-filled joints exhibit the highest compressive strengths.(3) Energy dissipation characteristics vary with joint angle.The reflected energy ratio increases initially and then decreases, peaking at α=45°,while the transmitted and absorbed energy ratios decrease initially and then increase, reaching their lowest values at α=45°.These findings provide critical insights into the dynamic behavior of jointed rock masses and have practical implications for engineering applications involving impact or blast loading.更多还原